Portable wireless device

Abstract

It is possible to provide a mobile phone ( 10 ) including: a first feeding section ( 14 ); a first ground ( 15 ) for providing a reference potential to the first feeding section ( 14 ); a second feeding section ( 16 ); a second ground ( 17 ) for providing a reference potential to the second feeding section ( 16 ); a first transmission line via which the first feeding section ( 14 ) and the second ground ( 17 ) are electrically connected to each other; and a second transmission line via which the second feeding section ( 16 ) and the first ground ( 15 ) are electrically connected to each other. With the arrangement, it is possible to provide a portable wireless device having antennas employing excitation of bodies, which portable wireless device can reduce deterioration of antenna characteristics even in a case where one of the bodies is held in a hand.

1 .- 21 . (canceled) 
     
     
         22 . A portable wireless device comprising:
 a first feeding section;   a first ground for providing a reference potential to the first feeding section;   a second feeding section;   a second ground for providing a reference potential to the second feeding section;   a first transmission line via which the first feeding section and the second ground are electrically connected to each other; and   a second transmission line via which the second feeding section and the first ground are electrically connected to each other.   
     
     
         23 . The portable wireless device as set forth in  claim 22 , further comprising:
 a first body;   a second body; and   a body coupling section for causing the first body and the second body to be coupled with each other,   the first feeding section and the first ground being provided in the first body,   the second feeding section and the second ground being provided in the second body,   the first transmission line and the second transmission line being provided in the body coupling section.   
     
     
         24 . The portable wireless device as set forth in  claim 23 , wherein:
 the first ground is caused to serve as a first antenna for a diversity technique; and   the second ground is caused to serve as a second antenna for the diversity technique.   
     
     
         25 . The portable wireless device as set forth in  claim 24 , wherein:
 the first body and the second body are coupled with each other so as to be rotatable forward and backward by using the body coupling section as an axis of rotation.   
     
     
         26 . The portable wireless device as set forth in  claim 24 , wherein:
 the first body and the second body are coupled with each other so as to be slidable with respect to each other by use of the body coupling section provided between the first body and the second body.   
     
     
         27 . The portable wireless device as set forth in  claim 24 , further comprising:
 a first impedance adjusting section having a first impedance, the first impedance adjusting section being provided on a path via which the first ground is electrically connected to the second feeding section; and   a second impedance adjusting section having a second impedance, the second impedance adjusting section being provided on a path via which the second ground is electrically connected to the first feeding section.   
     
     
         28 . The portable wireless device as set forth in  claim 27 , wherein:
 at least one of the first impedance and the second impedance is a variable impedance.   
     
     
         29 . The portable wireless device as set forth in  claim 24 , wherein:
 at least one of the first transmission line and the second transmission line has an arrangement in which an input and an output are high-frequency coupled with each other capacitively.   
     
     
         30 . The portable wireless device as set forth in  claim 24 , wherein:
 at least one of the first transmission line and the second transmission line has an arrangement in which an input and an output are connected to each other directly.   
     
     
         31 . A portable wireless device comprising:
 a first feeding section;   a first ground for providing a reference potential to the first feeding section;   a second feeding section;   a second ground for providing a reference potential to the second feeding section; and   a transmission line having a first terminal and a second terminal,   the first terminal of the transmission line being electrically connected to, via a first branch point provided between the first terminal and the second terminal, both the first feeding section and the first ground,   the second terminal of the transmission line being electrically connected to, via a second branch point provided between the first branch point and the second terminal, both the second feeding section and the second ground.   
     
     
         32 . The portable wireless device as set forth in  claim 31 , further comprising:
 a first body;   a second body; and   a body coupling section via which the first body and the second body are coupled with each other,   the first feeding section and the first ground being provided in the first body,   the second feeding section and the second ground being provided in the second body,   the transmission line being provided in the body coupling section,   the first branch point being provided in one of the first body and the body coupling section,   the second branch point being provided in one of the second body and the body coupling section.   
     
     
         33 . The portable wireless device as set forth in  claim 32 , wherein:
 the first body and the second body are coupled with each other so as to be rotatable forward and backward by using the body coupling section as an axis of rotation.   
     
     
         34 . The portable wireless device as set forth in  claim 32 , wherein:
 the first body and the second body are coupled with each other so as to be slidable with respect to each other by use of the body coupling section provided between the first body and the second body.   
     
     
         35 . The portable wireless device as set forth in  claim 32 , further comprising:
 a first impedance adjusting section having a first impedance, the first impedance adjusting section being provided on a path via which the first ground is electrically connected to the first branch point;   a second impedance adjusting section having a second impedance, the second impedance adjusting section being provided on a path via which the first feeding section is electrically connected to the first branch point;   a third impedance adjusting section having a third impedance, the third impedance adjusting section being provided on a path via which the second feeding section is electrically connected to the second branch point; and   a fourth impedance adjusting section having a fourth impedance, the fourth impedance adjusting section being provided on a path via which the second ground is electrically connected to the second branch point.   
     
     
         36 . The portable wireless device as set forth in  claim 32 , wherein:
 the first branch point is a first switch for switching a connection of the first terminal of the transmission line between the first feeding section and the first ground; and   the second branch point is a second switch for switching a connection of the second terminal of the transmission line between the second feeding section and the second ground.   
     
     
         37 . The portable wireless device as set forth in  claim 35 , wherein:
 at least one of the first impedance, the second impedance, the third impedance, and the fourth impedance is a variable impedance.   
     
     
         38 . The portable wireless device as set forth in  claim 32 , wherein:
 the transmission line has an arrangement in which the first terminal and the second terminal are high-frequency coupled with each other capacitively.   
     
     
         39 . The portable wireless device as set forth in  claim 32 , wherein:
 the transmission line has an arrangement in which the first terminal and the second terminal are connected to each other directly.   
     
     
         40 . The portable wireless device as set forth in  claim 24 , wherein:
 a connection state of at least one of the transmission line(s) is subjected to switching in accordance with a positional relationship between the first body and the second body.   
     
     
         41 . The portable wireless device as set forth in  claim 24 , wherein:
 the first feeding section is connected to a first wireless circuit used in a first frequency band;   the second feeding section is connected to a second wireless circuit used in a second frequency band which is different from the first frequency band;   in a case where a difference between a length of the first ground in a short side direction and ¼ of a wavelength of the second frequency band is less than a difference between a length of the second ground in a short side direction and ¼ of a wavelength of the first frequency band, the second feeding section is connected to one of ends of the first ground in the sort side direction; and   in a case where the difference between the length of the first ground in the short side direction and ¼ of the wavelength of the second frequency band is not less than the difference between the length of the second ground in the short side direction and ¼ of the wavelength of first frequency band, the first feeding section is connected to one of ends of the second ground in the short side direction.